package demo1;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class CardGame {
    //花色
    public String[] suits = {"♥","♣","♦","♠"};
    //买牌
    public List<Card> buyCard() {
        List<Card> cardList = new ArrayList<>();
        for(int i = 0;i < 4;i++) {
            for(int j = 1;j <= 13;j++) {
                cardList.add(new Card(suits[i],j));
            }
        }
        return cardList;
    }
    //洗牌
    public void shuffle(List<Card> cardList) {
        Random random = new Random();
        for(int i = cardList.size() - 1;i > 0;i--) {
            int index = random.nextInt(i);
            swap(cardList,i,index);
        }
    }
    private void swap(List<Card> cardList,int i,int j) {
        Card tmp = cardList.get(i);
        cardList.set(i,cardList.get(j));
        cardList.set(j,tmp);
    }
    //发牌
    public List<List<Card>> getCard(List<Card> cardList) {
        List<Card> hand1 = new ArrayList<>();
        List<Card> hand2 = new ArrayList<>();
        List<Card> hand3 = new ArrayList<>();

        List<List<Card>> hand = new ArrayList<>();
        hand.add(hand1);
        hand.add(hand2);
        hand.add(hand3);

        for(int i = 0;i < 5;i++) {
            for(int j = 0;j < 3;j++) {
                //揭牌:每次获取第一张牌
                Card card = cardList.remove(0);
                //拿牌
                hand.get(j).add(card);
            }
        }
        return hand;
    }
}
